lm5171 HTC Korea TAEJIN Technology Co., lm5171 Datasheet

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lm5171

Manufacturer Part Number
lm5171
Description
1.5a, 280khz, Boost Regulator
Manufacturer
HTC Korea TAEJIN Technology Co.
Datasheet

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lm5171AIM
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lm5171AIM
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Part Number:
lm5171D
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ST
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Part Number:
lm5171D
Manufacturer:
HTC
Quantity:
20 000
This part operate over a wide input voltage range, from 2.7V to 30V. The flexibility of the design allows the chip
to operate in most power supply configurations, including boost, flyback, forward, invering, and SEPIC.
practical means for limiting current. Combining high frequency operation with a highly integrated regulator
circuit results in an extremely compact power supply solution. The circuit design include provisions for features
such as frequency synchronization, shutdown, and feedback control.
2008 - Ver. 1.0
FEATURES
APPLICATION
DESCRIPTION
1.5A, 280kHz, Boost Regulator
The LM5171 product is 280 kHz switching regulator with a high efficiency, 1.5A intergrated switch.
This Ics utilize current mode architecture, which allows excellent load and line regulatuon, as well as a
Intergrated Power Switch 1.5A Guaranteed
Wide Input Voltage Range 2.7V to 30V
High Frequency Allows for Small Components
Minimum External Components
Easy External Synchronization
Frequency Foldback Reduces Component
Stress During an Overcurrent Condition
Thermal Shutdown with Hysteresis
Shut Down Current is 50 uA Maximum
Wide Ambient Temperature Range
Commercial Grade : 0℃ to 70℃
Moisture Sensitivity Level 3
LCD Monitor/TV LED Backlight Driver.
TFT-LCD Power Management
− 1 −
ORDERING INFORMATION
LM5171D
Device
SOP-8 PKG
LM5171
Marking
LM5171
Package
SOP-8
HTC

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lm5171 Summary of contents

Page 1

... TFT-LCD Power Management DESCRIPTION The LM5171 product is 280 kHz switching regulator with a high efficiency, 1.5A intergrated switch. This part operate over a wide input voltage range, from 2.7V to 30V. The flexibility of the design allows the chip to operate in most power supply configurations, including boost, flyback, forward, invering, and SEPIC. ...

Page 2

... Boost Regulator Figure 1. Application Circuit Figure 2. Block Diagram − 2 − LM5171 HTC ...

Page 3

... J T stg R θJA R θ Pin Symbol MAX Vcc 6 Test 6.0 V PGND 0.3 V AGND 0 V Vsw 40 V − 3 − LM5171 Value 0 to125 -65 to +150 165 45 1.2 230 V I MIN SOURCE - 0 200 mA - 0.3 V 1 0.3 V 1 0.3 V 1 0.3 V 4.0 A 1.0 mA ...

Page 4

... Vsw = 40V, Vcc = 0V Isw = 0 Vc<0.8V, SS=0V, 2.7V≤Vcc≤12V Vc<0.8V, SS=0V, 12V≤Vcc≤30V Vsw Switching, Maximum Isw=10mA Note 2 Note 2 − 4 − LM5171 < 125℃, unless otherwise stated Min TYP Max 1.246 1.276 1.300 -1.0 ...

Page 5

... Boost Regulator TYPICAL PERFORMANCE CHARACTERISTICS − 5 − LM5171 HTC ...

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... Boost Regulator − 6 − LM5171 HTC ...

Page 7

... Boost Regulator THEORY of OPERATION : Current Mode Control − 7 − LM5171 HTC ...

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... Boost Regulator − 8 − LM5171 HTC ...

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... Boost Regulator − 9 − LM5171 HTC ...

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... Boost Regulator − 10 − LM5171 HTC ...

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... Boost Regulator − 11 − LM5171 HTC ...

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... Boost Regulator − 12 − LM5171 HTC ...

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